A PULLING TOOL FOR USE IN A WELLBORE AND/OR TUBING AND A PROPULSION MODULE OF A PULLING TOOL

摘要

The invention relates to a pulling tool for use in a wellbore or tubing forpulling cable The pulling tool comprises apropulsion module (64) having a main section (1) and a propulsion arm (2)hinged to the main section (1) The propulsion arm includesa propulsion wheel (6, 37) with a gear system. An electric motor (8) drivesthe propulsion wheel (6, 37) via the gear system. The gearsystem may include a harmonic gear or a compound split ring epicyclic gear Theinvention further comprises a propulsion module(64) of a pulling tool including such a gear system.